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Experimental studies conducted in terms of problem research laboratory of feed additives National University of Life and Environmental Sciences of Ukraine. Independent experiment was conducted with growing Pharaoh Coturnix quails to determine the optimal valine-to-protein ratio for quail development. We conducted a randomized block experiment with 4 treatments, each with 5 replicates of 25 growing birds (1 to 35 d of age). A diet consisting of soybean and sunflower meal, wheat, corn, Fish meal, sunflower oil, concentrate (28% CP, 2.88 kcal/g on 1 to 21d of age, 20.5 % CP, 2.97 kcal/g on 22 to 35 d of age) having severally 1.54 and 1.33 % valine served as basal feed. Valine was supplemented in four graded levels up to 2.10 g/100 g on 1 to 21d of age and 1.54 g/100 g on 22 to 35 d of age at the expense of L-valine. Diets and water were offered ad libitum. Body weight gain and feed/gain ratio were studied. Quails significantly responded to the increasing valine concentration in growth, feed/gain ratio. Analysis was used to calculate the Valine nutrient recommendations. These estimates were 1.28 % for the starter and 1.23 % for the total Val for the grower period. Supplementation with Valine to the base diet resulted in body weight gain of quails equal to those fed the control diet (p |
